Vulnerability in Emclient Em Client
CVE-2020-12618
eM Client before 7.2.33412.0 automatically imported S/MIME certificates and thereby silently replaced existing ones. This allowed a man-in-the-middle attacker to obtain an email-validated S/MIME certificate from a trusted CA and replace the public key of the entity to be impersonated. This enabled the attacker to decipher further communication. The entire attack could be accomplished by sending a single email.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.003 (26.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 26th percentile — 26.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
References
- www.emclient.com/release-history (Release Notes, Vendor Advisory)
- www.nds.ruhr-uni-bochum.de/media/nds/veroeffentlichungen/2020/08/15/mailto-pape… (Third Party Advisory)
Frequently asked questions
- What is CVE-2020-12618?
- CVE-2020-12618 is a medium-severity vulnerability in Emclient Em Client. CVSS score: 4.8/10. Published 2020-08-20.
- How severe is CVE-2020-12618?
- Medium severity. CVSS v3 base score is 4.8 out of 10.